Renfrewshire and Inverclyde · Scotland
Roof structure repairs in Renfrewshire and Inverclyde
Homes in Renfrewshire and Inverclyde are mostly sandstone tenements. That matters for roof structure repairs: footings, wall construction and mortar all vary with the age of the building. Most of Renfrewshire and Inverclyde is on firmer ground than the clay belts of the south-east.
Guide price from£285per rafter inc VAT
- Area
- Renfrewshire and Inverclyde
- Pricing region
- Scotland
- Ground
- Mostly firmer ground
- Towns listed
- 9
Is Renfrewshire and Inverclyde prone to ground movement?
Renfrewshire has glacial till and Clyde alluvium with coal workings recorded in parts, while Inverclyde's towns climb steep slopes above the Clyde with many retaining walls.
Parts of Renfrewshire and Inverclyde lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. Across Renfrewshire and Inverclyde, most homes are sandstone tenements, villas in East Renfrewshire, and post-war estates.
Signs you may need roof structure repairs
- Ridge line dipping in the middle when seen from the street
- Top of an outside wall leaning out at eaves level
- Daylight through the tiles, or timber that is damp, stained or crumbling
- Struts, collars or ties cut out or missing in the loft
How much will roof structure repairs cost in Renfrewshire and Inverclyde?
Prices in Renfrewshire and Inverclyde are worked out on Scotland rates. They include VAT and are a starting point: access, the extent of the damage and whether an engineer or building control is involved all move the figure.
| Item | Guide price | Per |
|---|---|---|
| Repairing or doubling a rafter | £285 – £570 | per rafter |
| Purlin and strut strengthening | £1,150 – £2,850 | per roof |
| Tying in roof spread (straps and ties)est. | £760 – £2,400 | per roof |
Which repair method suits a home in Renfrewshire and Inverclyde?
Purlin and strut strengthening
Undersized purlins are strengthened with extra timber or replaced, and new struts are taken down to a load-bearing wall. Where there is no suitable wall, an engineer designs the load path. Temporary props hold the roof while members are changed.
Best for: Sagging slopes, slim purlins and struts removed from the loft
Tying in roof spread
New ties, collars or steel straps connect opposite rafters, or fix the rafter feet and wall plate firmly to the ceiling joists, so the outward thrust is resisted. Leaning wall heads are strapped back to the roof, and a badly spread roof may need partly rebuilding first.
Best for: Walls pushed out at eaves level by spreading rafters
Wall plate replacement
Rotten or crushed wall plates are replaced in short lengths while the rafters above are propped, and bedded on the wall in mortar. The plate is then strapped down to the masonry. It is often combined with rafter foot splices along the same run.
Best for: Rot along the eaves where rafters bear on the wall
What happens when we carry out roof structure repairs in Renfrewshire and Inverclyde?
Send photos
Photograph the roof from across the street, both slopes if you can, and the loft timbers with a torch. Include the eaves and any cracks just below them. From these we can usually tell sag from spread and whether an engineer is needed.
Loft and outside survey
On site we check rafter sizes and spacing, purlins, struts, ties and wall plates, look for rot and past alterations, and measure any lean at the wall head. The covering is noted too, because its weight affects the repair.
Engineer’s design where needed
Where purlins, struts or ties must be redesigned, or the roof carries a heavier covering, an independent chartered structural engineer is appointed to specify the work. We can arrange this, and their design sets the sizes and fixings.
Do you need approval for roof structure repairs in Scotland?
In Scotland, underpinning and other structural alterations generally need a building warrant from the council’s building standards service before work starts, and a completion certificate at the end; small like-for-like repairs often do not. There is no Party Wall Act in Scotland; shared walls are covered by title deeds and, for flats, the Tenements (Scotland) Act 2004.
Roof structure repairs near you in Renfrewshire and Inverclyde
Roof structure repairs in Renfrewshire and Inverclyde: questions and answers
Does the ground around Paisley cause cracking?
Renfrewshire has glacial till and Clyde alluvium with coal workings recorded in parts, while Inverclyde's towns climb steep slopes above the Clyde with many retaining walls. Parts of Renfrewshire and Inverclyde lie on a former coalfield, so a coal mining search is worth checking if movement has no obvious cause. Only an investigation on site can say why a particular building has moved.
How much will roof structure repairs cost in Renfrewshire and Inverclyde?
On Scotland rates, roof structure repairs starts from about £285 per rafter, including VAT. The written price depends on the extent of the damage, access and whether an engineer or building control is needed.
Is a sagging roof ridge dangerous?
A slight, even dip in an old roof is often historic movement that stopped long ago. A sag that is getting worse, cracking timbers, walls pushing out at the eaves or recently removed struts should be checked soon. Avoid storing heavy items in the loft until then.
What is roof spread?
Roof spread is when the feet of the rafters move outward because nothing is tying them together firmly enough. As they spread, the ridge drops and the tops of the walls are pushed out, often with a horizontal crack below the eaves. It is fixed by adding ties, collars or straps, sometimes with rebuilding.
Why are there cracks just below the eaves?
A horizontal crack just below the eaves, along the front or back wall, is a common sign of roof spread. The rafters push the top of the wall outward and the masonry cracks where it hinges. Corroded wall ties can cause similar cracks, so the cause needs checking.